	

    <?php
    /*
    * Copyright (c) 2003-2011, CKSource - Frederico Knabben. All rights reserved.
    * For licensing, see LICENSE.html or http://ckeditor.com/license
    */
     
    /**
     * \brief CKEditor class that can be used to create editor
     * instances in PHP pages on server side.
     * @see http://ckeditor.com
     *
     * Sample usage:
     * @code
     * $CKEditor = new CKEditor();
     * $CKEditor->editor("editor1", "<p>Initial value.</p>");
     * @endcode
     */
    class CKEditor
    {
            /**
             * The version of %CKEditor.
             */
            const version = '3.6.1';
            /**
             * A constant string unique for each release of %CKEditor.
             */
            const timestamp = 'B5GJ5GG';
     
            /**
             * URL to the %CKEditor installation directory (absolute or relative to document root).
             * If not set, CKEditor will try to guess it's path.
             *
             * Example usage:
             * @code
             * $CKEditor->basePath = '/ckeditor/';
             * @endcode
             */
            public $basePath;
            /**
             * An array that holds the global %CKEditor configuration.
             * For the list of available options, see http://docs.cksource.com/ckeditor_api/symbols/CKEDITOR.config.html
             *
             * Example usage:
             * @code
             * $CKEditor->config['height'] = 400;
             * // Use @@ at the beggining of a string to ouput it without surrounding quotes.
             * $CKEditor->config['width'] = '@@screen.width * 0.8';
             * @endcode
             */
            public $config = array();
            /**
             * A boolean variable indicating whether CKEditor has been initialized.
             * Set it to true only if you have already included
             * &lt;script&gt; tag loading ckeditor.js in your website.
             */
            public $initialized = false;
            /**
             * Boolean variable indicating whether created code should be printed out or returned by a function.
             *
             * Example 1: get the code creating %CKEditor instance and print it on a page with the "echo" function.
             * @code
             * $CKEditor = new CKEditor();
             * $CKEditor->returnOutput = true;
             * $code = $CKEditor->editor("editor1", "<p>Initial value.</p>");
             * echo "<p>Editor 1:</p>";
             * echo $code;
             * @endcode
             */
            public $returnOutput = false;
            /**
             * An array with textarea attributes.
             *
             * When %CKEditor is created with the editor() method, a HTML &lt;textarea&gt; element is created,
             * it will be displayed to anyone with JavaScript disabled or with incompatible browser.
             */
            public $textareaAttributes = array( "rows" => 8, "cols" => 60 );
            /**
             * A string indicating the creation date of %CKEditor.
             * Do not change it unless you want to force browsers to not use previously cached version of %CKEditor.
             */
            public $timestamp = "B5GJ5GG";
            /**
             * An array that holds event listeners.
             */
            private $events = array();
            /**
             * An array that holds global event listeners.
             */
            private $globalEvents = array();
     
            /**
             * Main Constructor.
             *
             *  @param $basePath (string) URL to the %CKEditor installation directory (optional).
             */
            function __construct($basePath = null) {
                    if (!empty($basePath)) {
                            $this->basePath = $basePath;
                    }
            }
     
            /**
             * Creates a %CKEditor instance.
             * In incompatible browsers %CKEditor will downgrade to plain HTML &lt;textarea&gt; element.
             *
             * @param $name (string) Name of the %CKEditor instance (this will be also the "name" attribute of textarea element).
             * @param $value (string) Initial value (optional).
             * @param $config (array) The specific configurations to apply to this editor instance (optional).
             * @param $events (array) Event listeners for this editor instance (optional).
             *
             * Example usage:
             * @code
             * $CKEditor = new CKEditor();
             * $CKEditor->editor("field1", "<p>Initial value.</p>");
             * @endcode
             *
             * Advanced example:
             * @code
             * $CKEditor = new CKEditor();
             * $config = array();
             * $config['toolbar'] = array(
             *     array( 'Source', '-', 'Bold', 'Italic', 'Underline', 'Strike' ),
             *     array( 'Image', 'Link', 'Unlink', 'Anchor' )
             * );
             * $events['instanceReady'] = 'function (ev) {
             *     alert("Loaded: " + ev.editor.name);
             * }';
             * $CKEditor->editor("field1", "<p>Initial value.</p>", $config, $events);
             * @endcode
             */
            public function editor($name, $value = "", $config = array(), $events = array())
            {
                    $attr = "";
                    foreach ($this->textareaAttributes as $key => $val) {
                            $attr.= " " . $key . '="' . str_replace('"', '&quot;', $val) . '"';
                    }
                    $out = "<textarea name=\"" . $name . "\"" . $attr . ">" . htmlspecialchars($value) . "</textarea>\n";
                    if (!$this->initialized) {
                            $out .= $this->init();
                    }
     
                    $_config = $this->configSettings($config, $events);
     
                    $js = $this->returnGlobalEvents();
                    if (!empty($_config))
                            $js .= "CKEDITOR.replace('".$name."', ".$this->jsEncode($_config).");";
                    else
                            $js .= "CKEDITOR.replace('".$name."');";
     
                    $out .= $this->script($js);
     
                    if (!$this->returnOutput) {
                            print $out;
                            $out = "";
                    }
     
                    return $out;
            }
     
            /**
             * Replaces a &lt;textarea&gt; with a %CKEditor instance.
             *
             * @param $id (string) The id or name of textarea element.
             * @param $config (array) The specific configurations to apply to this editor instance (optional).
             * @param $events (array) Event listeners for this editor instance (optional).
             *
             * Example 1: adding %CKEditor to &lt;textarea name="article"&gt;&lt;/textarea&gt; element:
             * @code
             * $CKEditor = new CKEditor();
             * $CKEditor->replace("article");
             * @endcode
             */
            public function replace($id, $config = array(), $events = array())
            {
                    $out = "";
                    if (!$this->initialized) {
                            $out .= $this->init();
                    }
     
                    $_config = $this->configSettings($config, $events);
     
                    $js = $this->returnGlobalEvents();
                    if (!empty($_config)) {
                            $js .= "CKEDITOR.replace('".$id."', ".$this->jsEncode($_config).");";
                    }
                    else {
                            $js .= "CKEDITOR.replace('".$id."');";
                    }
                    $out .= $this->script($js);
     
                    if (!$this->returnOutput) {
                            print $out;
                            $out = "";
                    }
     
                    return $out;
            }
     
            /**
             * Replace all &lt;textarea&gt; elements available in the document with editor instances.
             *
             * @param $className (string) If set, replace all textareas with class className in the page.
             *
             * Example 1: replace all &lt;textarea&gt; elements in the page.
             * @code
             * $CKEditor = new CKEditor();
             * $CKEditor->replaceAll();
             * @endcode
             *
             * Example 2: replace all &lt;textarea class="myClassName"&gt; elements in the page.
             * @code
             * $CKEditor = new CKEditor();
             * $CKEditor->replaceAll( 'myClassName' );
             * @endcode
             */
            public function replaceAll($className = null)
            {
                    $out = "";
                    if (!$this->initialized) {
                            $out .= $this->init();
                    }
     
                    $_config = $this->configSettings();
     
                    $js = $this->returnGlobalEvents();
                    if (empty($_config)) {
                            if (empty($className)) {
                                    $js .= "CKEDITOR.replaceAll();";
                            }
                            else {
                                    $js .= "CKEDITOR.replaceAll('".$className."');";
                            }
                    }
                    else {
                            $classDetection = "";
                            $js .= "CKEDITOR.replaceAll( function(textarea, config) {\n";
                            if (!empty($className)) {
                                    $js .= "        var classRegex = new RegExp('(?:^| )' + '". $className ."' + '(?:$| )');\n";
                                    $js .= "        if (!classRegex.test(textarea.className))\n";
                                    $js .= "                return false;\n";
                            }
                            $js .= "        CKEDITOR.tools.extend(config, ". $this->jsEncode($_config) .", true);";
                            $js .= "} );";
     
                    }
     
                    $out .= $this->script($js);
     
                    if (!$this->returnOutput) {
                            print $out;
                            $out = "";
                    }
     
                    return $out;
            }
     
            /**
             * Adds event listener.
             * Events are fired by %CKEditor in various situations.
             *
             * @param $event (string) Event name.
             * @param $javascriptCode (string) Javascript anonymous function or function name.
             *
             * Example usage:
             * @code
             * $CKEditor->addEventHandler('instanceReady', 'function (ev) {
             *     alert("Loaded: " + ev.editor.name);
             * }');
             * @endcode
             */
            public function addEventHandler($event, $javascriptCode)
            {
                    if (!isset($this->events[$event])) {
                            $this->events[$event] = array();
                    }
                    // Avoid duplicates.
                    if (!in_array($javascriptCode, $this->events[$event])) {
                            $this->events[$event][] = $javascriptCode;
                    }
            }
     
            /**
             * Clear registered event handlers.
             * Note: this function will have no effect on already created editor instances.
             *
             * @param $event (string) Event name, if not set all event handlers will be removed (optional).
             */
            public function clearEventHandlers($event = null)
            {
                    if (!empty($event)) {
                            $this->events[$event] = array();
                    }
                    else {
                            $this->events = array();
                    }
            }
     
            /**
             * Adds global event listener.
             *
             * @param $event (string) Event name.
             * @param $javascriptCode (string) Javascript anonymous function or function name.
             *
             * Example usage:
             * @code
             * $CKEditor->addGlobalEventHandler('dialogDefinition', 'function (ev) {
             *     alert("Loading dialog: " + ev.data.name);
             * }');
             * @endcode
             */
            public function addGlobalEventHandler($event, $javascriptCode)
            {
                    if (!isset($this->globalEvents[$event])) {
                            $this->globalEvents[$event] = array();
                    }
                    // Avoid duplicates.
                    if (!in_array($javascriptCode, $this->globalEvents[$event])) {
                            $this->globalEvents[$event][] = $javascriptCode;
                    }
            }
     
            /**
             * Clear registered global event handlers.
             * Note: this function will have no effect if the event handler has been already printed/returned.
             *
             * @param $event (string) Event name, if not set all event handlers will be removed (optional).
             */
            public function clearGlobalEventHandlers($event = null)
            {
                    if (!empty($event)) {
                            $this->globalEvents[$event] = array();
                    }
                    else {
                            $this->globalEvents = array();
                    }
            }
     
            /**
             * Prints javascript code.
             *
             * @param string $js
             */
            private function script($js)
            {
                    $out = "<script type=\"text/javascript\">";
                    $out .= "//<![CDATA[\n";
                    $out .= $js;
                    $out .= "\n//]]>";
                    $out .= "</script>\n";
     
                    return $out;
            }
     
            /**
             * Returns the configuration array (global and instance specific settings are merged into one array).
             *
             * @param $config (array) The specific configurations to apply to editor instance.
             * @param $events (array) Event listeners for editor instance.
             */
            private function configSettings($config = array(), $events = array())
            {
                    $_config = $this->config;
                    $_events = $this->events;
     
                    if (is_array($config) && !empty($config)) {
                            $_config = array_merge($_config, $config);
                    }
     
                    if (is_array($events) && !empty($events)) {
                            foreach ($events as $eventName => $code) {
                                    if (!isset($_events[$eventName])) {
                                            $_events[$eventName] = array();
                                    }
                                    if (!in_array($code, $_events[$eventName])) {
                                            $_events[$eventName][] = $code;
                                    }
                            }
                    }
     
                    if (!empty($_events)) {
                            foreach($_events as $eventName => $handlers) {
                                    if (empty($handlers)) {
                                            continue;
                                    }
                                    else if (count($handlers) == 1) {
                                            $_config['on'][$eventName] = '@@'.$handlers[0];
                                    }
                                    else {
                                            $_config['on'][$eventName] = '@@function (ev){';
                                            foreach ($handlers as $handler => $code) {
                                                    $_config['on'][$eventName] .= '('.$code.')(ev);';
                                            }
                                            $_config['on'][$eventName] .= '}';
                                    }
                            }
                    }
     
                    return $_config;
            }
     
            /**
             * Return global event handlers.
             */
            private function returnGlobalEvents()
            {
                    static $returnedEvents;
                    $out = "";
     
                    if (!isset($returnedEvents)) {
                            $returnedEvents = array();
                    }
     
                    if (!empty($this->globalEvents)) {
                            foreach ($this->globalEvents as $eventName => $handlers) {
                                    foreach ($handlers as $handler => $code) {
                                            if (!isset($returnedEvents[$eventName])) {
                                                    $returnedEvents[$eventName] = array();
                                            }
                                            // Return only new events
                                            if (!in_array($code, $returnedEvents[$eventName])) {
                                                    $out .= ($code ? "\n" : "") . "CKEDITOR.on('". $eventName ."', $code);";
                                                    $returnedEvents[$eventName][] = $code;
                                            }
                                    }
                            }
                    }
     
                    return $out;
            }
     
            /**
             * Initializes CKEditor (executed only once).
             */
            private function init()
            {
                    static $initComplete;
                    $out = "";
     
                    if (!empty($initComplete)) {
                            return "";
                    }
     
                    if ($this->initialized) {
                            $initComplete = true;
                            return "";
                    }
     
                    $args = "";
                    $ckeditorPath = $this->ckeditorPath();
     
                    if (!empty($this->timestamp) && $this->timestamp != "%"."TIMESTAMP%") {
                            $args = '?t=' . $this->timestamp;
                    }
     
                    // Skip relative paths...
                    if (strpos($ckeditorPath, '..') !== 0) {
                            $out .= $this->script("window.CKEDITOR_BASEPATH='". $ckeditorPath ."';");
                    }
     
                    $out .= "<script type=\"text/javascript\" src=\"" . $ckeditorPath . 'ckeditor.js' . $args . "\"></script>\n";
     
                    $extraCode = "";
                    if ($this->timestamp != self::timestamp) {
                            $extraCode .= ($extraCode ? "\n" : "") . "CKEDITOR.timestamp = '". $this->timestamp ."';";
                    }
                    if ($extraCode) {
                            $out .= $this->script($extraCode);
                    }
     
                    $initComplete = $this->initialized = true;
     
                    return $out;
            }
     
            /**
             * Return path to ckeditor.js.
             */
            private function ckeditorPath()
            {
                    if (!empty($this->basePath)) {
                            return $this->basePath;
                    }
     
                    /**
                     * The absolute pathname of the currently executing script.
                     * Note: If a script is executed with the CLI, as a relative path, such as file.php or ../file.php,
                     * $_SERVER['SCRIPT_FILENAME'] will contain the relative path specified by the user.
                     */
                    if (isset($_SERVER['SCRIPT_FILENAME'])) {
                            $realPath = dirname($_SERVER['SCRIPT_FILENAME']);
                    }
                    else {
                            /**
                             * realpath - Returns canonicalized absolute pathname
                             */
                            $realPath = realpath( './' ) ;
                    }
     
                    /**
                     * The filename of the currently executing script, relative to the document root.
                     * For instance, $_SERVER['PHP_SELF'] in a script at the address http://example.com/test.php/foo.bar
                     * would be /test.php/foo.bar.
                     */
                    $selfPath = dirname($_SERVER['PHP_SELF']);
                    $file = str_replace("\\", "/", __FILE__);
     
                    if (!$selfPath || !$realPath || !$file) {
                            return "/ckeditor/";
                    }
     
                    $documentRoot = substr($realPath, 0, strlen($realPath) - strlen($selfPath));
                    $fileUrl = substr($file, strlen($documentRoot));
                    $ckeditorUrl = str_replace("ckeditor_php5.php", "", $fileUrl);
     
                    return $ckeditorUrl;
            }
     
            /**
             * This little function provides a basic JSON support.
             *
             * @param mixed $val
             * @return string
             */
            private function jsEncode($val)
            {
                    if (is_null($val)) {
                            return 'null';
                    }
                    if (is_bool($val)) {
                            return $val ? 'true' : 'false';
                    }
                    if (is_int($val)) {
                            return $val;
                    }
                    if (is_float($val)) {
                            return str_replace(',', '.', $val);
                    }
                    if (is_array($val) || is_object($val)) {
                            if (is_array($val) && (array_keys($val) === range(0,count($val)-1))) {
                                    return '[' . implode(',', array_map(array($this, 'jsEncode'), $val)) . ']';
                            }
                            $temp = array();
                            foreach ($val as $k => $v){
                                    $temp[] = $this->jsEncode("{$k}") . ':' . $this->jsEncode($v);
                            }
                            return '{' . implode(',', $temp) . '}';
                    }
                    // String otherwise
                    if (strpos($val, '@@') === 0)
                            return substr($val, 2);
                    if (strtoupper(substr($val, 0, 9)) == 'CKEDITOR.')
                            return $val;
     
                    return '"' . str_replace(array("\\", "/", "\n", "\t", "\r", "\x08", "\x0c", '"'), array('\\\\', '\\/', '\\n', '\\t', '\\r', '\\b', '\\f', '\"'), $val) . '"';
            }
    }

